Emery or abrading wheel



Patented Dec. 6, 1932 UNITED. STATES PATENT ,OFFICE JAMES Ross MITC EL or mon'rrnmnn, vnnmonrr V insanity on ABRADING WHEEL Application maa nrao, 1931. Serial No: 534,037.

This invention relates to abrading or polity of segmental annuli, in which the segments of each annulus arespaced'apart and the spaces between the segments of the group of annuli are out of alignment radially of the wheel so as to prevent the too rapid passage of the'abrasive from the center of the wheel to the outer edge thereof.

A still further object of the invention is to provide a novel means fordirecting the abrasive circumferentially as it passes between the segments of one annulus to those of the adiacent annulus so that a portion thereof will be fed beneath the. annulus segments.

provide a wheel of the above described character in which each segment of each annulus is formed at one end to provide a receiving 'mouth into which the abrasive is directed from the end of the adjacent segment, so that a greater quantity of the abrasive will be worked between the annuli of the wheel and vide a polishing wheelmade up of a plural- A still further object'of theinvention is to;

segment 4'has its, bottom corner'rounded 0a as indicated at 6 and has formed inthe under tures of the invention as expressed in theappended claims. a v y In the drawing l Figure l is a view in bottom plan of the M abrading wheel embodying the present jinn? vention;

Figure 2 is a sectional viewtaken on the line 2-2 of Figure I Figure 3 is a sectional view taken on the line 3'3 of Figure 1;and 9 r Figure 4 is a side elevational View of the wheel, showing attached thereto the structure by which the wheel is connected with mechanism for rotating it, a I a Referring nowmoreparticularly to the drawing wherein like numerals of, reference designate corresponding parts throughout the several views, the numeral 1 indicates generally the emery or abrasive wheel embodying the present invention. Thiswheel is made up of an outer annulus 2 and a series of inner annuli each of which is indicated generally by the numeral 3. All of these an nulae are in spaced relation.

Each annulus 3 is divided into a number I of segments, each of which is indicateclby the numeral 4, those illustrated beingfseparated into four segments. Eachsegment 4 a has one end formed to provide a vertical wall "portion 5 of ogee curvature, this surface terminating at the end ofthe segment, preferably inwardly slightly from the outeror convex face thereof. At its other end, each face across this rounded corner or end 6'the mouth 7 These mouths 7 are in the form of.

channels cutat an inclination across the rounded end of the segment,"starting adjaw cent the top'thereof' and curving inwardly and downwardly to come out through the bottom face of the segment at a substantial case each annulus is divided into four seg ments, the radial centers thereof form the corners of an imaginary square at the center or the wheel. By locating the radial center of each segment at a different point from the others, the reduced or feeding ends of the segments are directed toward the center of the mouth of the adjacent segment.

As previously stated, the adjacent en d s of o the segments of each annulus are in spaced relation to provide a passageway for someof' the abrasive material to pass through toward the periphery of the wheel. In order to prevent the material from passing too rapidly dially of the wheel;

from the center of the wheel outwardly, and alsoto cause it to strikethe curved feeding or guide faces 5 of the segments so thata portion thereof will be directedfrom these faces into the adjacent segment mouths 7 the segments are arranged with the passages between the ends thereof out of allgnment ra- The outer or terminal annulus 2 has formed in the inner wall thereof a series of pockets 8 and one end of each of these pockets forms a vertical wall 9, the lower edge of which is rounded similar to the rounded edge 6 of-each of the segments, and this rounded surface has a channel formed therein which forms: a amouth -10 which opens through the bottom faceof the annulus at a point removedfrom the wall 9. Itwill thuslbe seen that all of the abrasive material which passesradially outwardly through the passages, between the spaced ends of the segments 4, will finally collect againstthe inner wall of the unbroken fouter annulus or terminal annulus and will find' its way into thepockets 8 from which it will be guided into the mouths 10 to be fed therefrom betweenithe bottom face of the annulus and the surface of the stone body or other body being polished.

The'annuli makingup the present abrasiv e'wheel may be mounted in any suitable manner. i In illustrating the invention these ameter ofthe wheel. ,The height or thick- -.ness of these annuli is also determined by" V the size of the wheel of which they form a part. Wheels of this character are employed in a variety of sizes ranging from six to eigl ity-four inches in diameter.- 7 1 rom the foregoing'description it-will be readily seen-that with a wheel constructedin accordance with the present invention the passage of the abrasive material which is introduced through the center of the wheel will be much slower from the center tothe outer rim of the wheel due to the manner in which the passages between the segments are 10- cat-ed than in wheels of the character at present in use and in addition to this, more of the abrasive material passing through these passages will find its way under the segments because of the curved guide pieces at the ends thereof and thew-abrasive material receiving mouths adjacent these surfaces. v Having thus described the invention, what is claimed is g ,1. A polishing wheel of the characterderelation in the same plane, 'eaich of said members being divided intoa'plurality offseg l -ments, means formed in one end of 'eachsegment and opening through the working face thereof, for receiving an abrasive, the end of the adjacent segment directedtoward said means, being formed'to guide abrasive mapterial to the said means, and a terminal an nulus surrounding the segmental annuli; 2. An abrasive wheel of the character described, comprising a plurality of 'segmental annuli each havlng a mouth vformed in one end and opening through the working face thereof, and eachfurther having its inner.

surface at the other end cut away to form a curved wall, the segments ofeach annulus being in spaced relation and havin'g the ta-' pered ends thereof directed toward ters of adj acent mouths.

the censcribed, comprising a series of annular members of graduated sizes and disposed 1n spaced.

,3. An abrasive wheel of the'ch'aracterdescribed, comprising a pluralityof segmental annuli'each having a} mouth formedin. one

end and opening throughthe workingface thereof, and each further having its inner surface at the other-end cut away to forma curved wall, thesegments of each annulus be; ing in spaced relationand having the tapered endsthereof directed toward the centers of" adjacent mouths, the spaces between the segf "mentsof'each annulus providing passages for the movement of abrasive materialravdially of the wheel, and said passages being arranged in staggered relation radially of the wheel to hinder the passage of the abrasive material toward the periphery of the wheel.

e. An abrasive wheel of thecharacter described, comprisinga series of segmental annull arranged one within the -other and in spaced relation and havingfiat abrading -surfaces disposed in the same' plane, the segments of each annulusbeing spaced apart to. provide abrasive passages,-means at one end of each segment; for directingabrasive mas terial circumferentially thereof towardthe r adjacent end ofthe adjacent segment,'and

means for gathering abrasive material beneath the said adjacentend of the adjacent segment to direct the same beneath the abrading surface of the segment and a body of work.

5. An abrasive wheel of the character described, comprising a plurality of segmental annuli of graduated sizes, arranged one within the other and having flat abrading surfaces disposed in the same plane, the segments of each annulus being in spaced rela-' tion to provide an abrasive material passage therebetween, each segment having one end formed with a vertical wall of ogee cur;- vature to provide the same with a tapered abrasive guide surface, the other end of each segment having the bottom corner. rounded and having the rounded surface provided with an abrasive receiving-mouth opening through the fiat abrading face thereof, said segments of each annulus having different radial centers to direct thetapered abrasive guiding end toward the center of the adja cent abrasive receiving mouth,and said abrasive passages being out of alignment radially of the wheel to hinder the radial passage of the abrasive material.-

6. An abrasive wheel of the character described, comprising a plurality of segmental annuli of graduated sizes, arranged one Within the other and having flat abrading surfaces disposed in the same plane, the segments of each annulus being in spaced relation to provide an abrasive materialpassage therebetween, each segment having one end formed with a vertical wall of ogee curva- 85 ture to provide the same with a tapered abra sive guide surface, the other end of each segment having the bottom corner rounded and having the rounded surface provided with an abrasive receiving mouth opening through the flat abrading face thereof, said segments of each annulus having dilferent radial centers to direct the tapered abrasive guiding end toward the center of the adjacent abrasive receiving mouth, and said abrasive passages being out of alignment radially of the wheel to hinder the radial passage of the abrasive material, and a terminal annulus surrounding the segmental annulae and having its inner surface provided with a plu- 8D rality of abrasive receiving pockets each hav- 1 ing a straight end wall and an abrasive receiving mouth opening through said end wall and through the abrading face of the annulus. V r Y 7 A grinding wheel having radially spaced grinding members, with the inner side wall of one grinding member shaped to provide pockets to receive abrasive, the extreme inner edge portion of the side wall 60, forming each pocket being hook -shaped and being projected forwardly. 1

In testimony whereof hereunto affix my g V.

signature' r r i a JAMES ROSSMITCHELL. 

